When drawing, lines are fundamental elements of composition. They delineate space, outline structures, and define boundaries. When it comes to maps and borders, the line acquires a particular meaning, as this “simple” graphic expression marks a powerful division between regions, setting the beginning or the end of a territory. This line has a profound meaning at the limit between Mexico and the United States, where it constantly blurs and questions the border. In these places, multiculturalism is a daily occurrence, with a continuous negotiation of boundaries present in all aspects of life. The dynamic of these borders involves design and the generation of a complex network of interactions and collaborations.